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15 Cards in this Set

  • Front
  • Back
regular reflection
light reflected back to the observer in parallel beams, produces clear images
diffuse reflection
scattered, fuzzy reflection from a rough surface where light is randomly reflected, not clear, ex:white wall, concrete sidewalk
angle of refraction
angle that the refracted ray makes with the normal to the surface
optically dense
angle of refraction is smaller than the angle of incidence, new medium is optically dense
normal line
imaginary line that is perpendicular to boundary
refraction of light
bending of light through a different media
index of refraction
a measure of how much light bends when it passes into a medium from a vacuum, also measures how fast light travels in a medium
total internal reflection
when light passes through from a more optically dense medium into a less optically dense medium, the light ray will bend away from the normal, angle of incidence is greater than angle of refraction
critical angle
incident angle unique to a subsntace that causes the refracted ray to lie along hte boundary of the substance
reflected light
when incident angle exceeds critical angle, lights will be reflected
separtion of light into its spectrum, ex=rainbows: refraction occurs when rays pass into and out of raindrops
what happens when light falls on a prism?
it is dispersed into a spectrum of colors
effects of refraction
mirages: it is produced by the reflection of light when it passes into a layer of hot air lying close to a heated ground surface
fiber optics
the core is made of glass or plastic or highly transparent materials becuz it can transmit light over a variety of distances, there is a sheath to cover the outer layer so light cannot come in. each time the light strikes the surface the angle of incidence is greater than the critical angle, thus the reflection is total keeping the light within the fiber
application of total internal reflection
plants, surgical tools for microsurgery, telecommunication